The tree lawn belongs to the city. However, the owner or occupant of the premises fronting the tree lawn or boulevard, which is defined as that area between a sidewalk and street, shall be the custodian of the tree lawn or boulevard and shall be responsible for the necessary mowing and maintenance to keep the same in good condition, mowed and free of trash or debris. If your tree lawn tree constitutes a safety hazard, then the Service Department may contact you.